Sash retaining weatherstrip



April 1956 o. CHRISTENSEN 2,740,172

SASH RETAINING WEATHERSTRIP Filed Feb. 13, 1953 2 Sheets-Sheet l -37u. y- 5 In Vet? for 7!- 0/0 f /h'lzsfen Ser? April 3, 1956 o. CHRISTENSEN 2,740,172

SASH RETAINING WEATHERSTRIP Filed Feb. 13, 1953 2 Sheets-Sheet 2 Invenzor O/af [/zrfisfevaerz 2,740,172 RE NI EA E S R P Christensen, Chicago, 111., assignor to Protex Weafli st n a u c i a .1-, i ago, I L, a co nbr t f'l l ao s Appl cati fibi' la 1 Serial No. 336, 5

' 6 Claims. (Cl, 20-..-52.4)

This invention relates to sash retaining Weatherstripping, and particularly to such eatherstripping that is adapted to engage the sash of a double hung window intall-ar s n a u h m ane s o apply r c i retaining three to e sa h,

There have been many attempts to provide means along thssiq also at. doubl hun nd s s to p y a h e ainin forc s o h 1 s tha he sa will be f t t ly main a ed. n an p s on 0 er ca ad s m n s and ia aa a ar an eme ts pr s h en-mad so that the sash may be shifted laterally from their normal positions in an amount suflicient to release the sash from one ash u w e eby t nab e t 1 1 t e qu c l and easily removed from or mounted in the sash runways. n such pri e li o at v ly m unte s s t t res he nec ssity r relatively large l eral f r e on the sash to retain the sash in the desired positionof vertical adjustrnenthas rendered the removal of the sash quite difireult, and it is theprimary object oi; the present nven on to a le suchrcm c, r c nal y a ned a l to be a ily an ea ly ovede eby o. mpl fy the n rmal pke p and: an gof5 such dow s sht M re p c fica y, t isan bjec of h present invll tion to provide a sash Weatherstripping and retaining means that is extremely simple in structure, and; which may I onom ally man fac r d and; installed. It is a: further and related object of the present invention to enable the frictional retaining forces to be applied-to-sash of the aforesaid character in such, away that the swelling or expansion of: the sash in certain seasonsof the year does not materially or objectionably alter the operating characteristics of the sash. Specifically, itis antobject of this invention toobtain this result in such a way thatthe frictionallyretaining forces are applied to the sash intwo different ways, and to accomplish this in; a manner such that one typeof frictional retaining force which is applied parallel to. the plane of the sash is augmented by-Ma second frictional force. that is applied perpendicular to the plane of the sash. It; is a related objeet'to enahle this second retaining force that is appliedperp'endicular to the plane of the sash to be automatically reduced as anincident to lateral swellingof the window sash;- thus to reduce this perpendicular force at the same time that the-parallel forces are being increased due to'swellingof i the; sash. A more specific object is to attain a frictional retaining force by.- a resilientclamping-actionfi exerted -on the border or edge portion of a. sash by forces" acting perpendicular to the. plane of the sash:

Other and further objectsof the present inventionwill be. apparent from the following description-andclaiins and are illustrated in the accompanying drawings which by way of illustration, show a preferred embodiment of the present. invention and the principles thereof a'nd' what I now consider to be the best'mod'e inwhich I have'cone templated applying these principles. Otherembodiments of the'invention embodying the same or equivalentprinciples may beusedand structural changes may; be made as desired by those skilled in the art without'departin'g from the presentinvention and the purview of theap pended claims;

In the drawings: f

Fig. 1 is a transverse sectional view off'a weather seal} ingand sashretainingstrip embodying the features ofithe invention;

7 2,740,172 Patented Apr. 3, 1956 Fig, 2 is, a face view of the strip;

Fig. 3' is a horizontal sectional view shown in perspecfive and illustrating the strip in position in one side stile of a double hungwindow structure;

Fig, 4 is an enlarged horizontal sectional view of the 7 side stile of such an installation with the strip mounted thereon;

Fig. 5 is a view similar to Fig; 4 with the window sash in place;

Fig, dis a fragmentary inside view of a double hung in im dl tion; a

Fig. 7 is' a fragmentary vertical sectional view taken substantially along the line7'7 of Fig, 6;

Fig, 8 is a horizontal sectional view taken substantially alo g; h line .i-8 of Fig. 6.; and c Fi 91's a fragmen ary iag mma ic view illus r n he p inc ple of op ra i n f. the pr s nt strip.

nor" purposes or disclosure the invention is herein: illus trated as e'inliodied in a weather sealing and sash retaining and positioning strip 20 that is shown in detail in Figs 1 and 2' as heingforme'dfrom an elongated stripof thin h et .rnctal Y h et me al" that may be advantageously empl y d isaluminumin whatis known commercially as thespring type r g es, and th s material is availabl in coils so n i.

ing. Thus, asshown in Fig, the-strip liapedl tea cross c icnalform ha is ymmetrical respect to. the longitudinal center plane'of the strip and. which provides a generally U-shaped" parting stop housing 21f located midway between the edges of the Strip and, provides a. pair of oppositely directed arms- 21-2 extending from: the open side of the U-shapedfpartingtstop ho sin 21a Thespart hgistcp housing El as shown in Fig.1 1,; com.- prisesa mounting web. 2ft thathas a width equal to: or

slightly, greater: thanv the widthof the partingjstop which tween themour-rthlgg webs 254; and; the/reaction: webs-'24 is preferably; slightly less: than 99' degrees since: this causes; thewebs to grip: the parting-stop and aid stabilizing the -strip so; as to" promote tlie: novel? funetioning ofithe strip 201 as wi-lla be described: in detail hercinaftenz The width; of the-:reaction webs. 2--i's such t-h t th webs;2-,4 will exte-ndtalong the-"parallel sides of; the, partingtstoprfor a.- substantial distance;- and the metal ofthegstrip;isrthembenfi outwardly in relatively large radius bends 25; to; form. diverging webs 26- which serve witllrthematerial: in the bends 25 to provide the"primary sourcemof the important: resilient forces which come' into play; inithefunctioning-of thest ripZti; as will be described;

At the} edges r thee-wa ing webs the strip is formcdzwithsubstantially right angle bends 27'so-a's to provide-thmarmsi 22' of; the strip, and each ofitlie'se arnis 22:":has an overal'lflwidth some-what less than the Width or moved'as requi'redand as will= bed'escrihedir Eai'c'h arm 22 .compnisesan inner web 23'extendeeloutwaifdly' from: the: head 27; a rib 29 integral with theouter edge ot' 'the; webzzfig-andfan outer web 3th lying substantially? the sameplane as the weh28- andintegrally extended from tli'e'" 29f 'an d"preferably" hemmed" along, its edgfe 'at 3.1.. .i

toward the bottom of the sash runway.

' Thus as shown in Figs. 3 to 5, the strip is adapted for convenient mounting in a conventional side stile of a window frame so as to afford Weather sealing and sash retaining means for the two adjacent and parallel sash runways 36L and 37U that are afforded in such a stile for upper and lower sash 37L and 37U of the kind normally used in double hung sash installations. The stile 35 is formed in the present instance by a plank type member 38 having an outer stop 39, and inner stop 40 and an intermediate parting stop 41 set in a locating groove 42 midway between the stops 39 and 4% so that these elements form the aforesaid runways 36L and 36U. The housing portion 21 of the strip 26 embraces and houses the outer portion of the parting stop 41 with the mounting web 23 against the outer face of stop 41 and the reaction webs 24 engaging the opposite side faces of the stop 4i, and the strip is secured in position by fastening elements which may take the form of relatively long screws 43 extended through openings 44 formed in the mounting web 23 and passing entirely through the parting stop 41 and into the member 38 so as to serve the additional function of holding the stop 41 in place. When the strip 20 is thus mounted the bends 27 of the strip are spaced somewhat from the bottoms of the runways 36L and 36U, and the arms 22 extend across the runways and outwardly away from the bottoms of the runways so that the hemmed edges 31 are disposed at substantially the outer plane of the guideways relatively near the corners 59C and 40C of the stops 39 and 40. The beads 29 are thus disposed substantially midway between the stops 39 and 40 and the parting stop 41, and are adapted to engage with grooves 45 formed in the vertical edges of the sash. When the sash are in their normal operating relation in the runways, the arms 22 of the strip 20 are bent inwardly as shown in Fig. 5, and the edges 31 bear against the side edges of the sash to provide a first weather seal, the beads 29 engage along a line 29B with the side surfaces 458 of the grooves 45 to provide a second weather seal, and the faces of the sash engage the reaction webs 24 to provide a third weather seal, and as will be described in detail hereinafter, the novel resilient action of the strip 20 is such that there is a substantial clamping force exerted by the rib 29 along the line 293 against the face 45B perpendicular to such face 453 and toward the parting strip so that the sash is gripped with a vise-like or clamp-like action between the bead 29 and the web 24. g

The fundamental structural relationships of the elements of the strip 20 which cause it to attain this novel and advantageous gripping action are schematically illustrated on an enlarged scale in Fig. 9 of the drawings. Thus, with the strip in position it is found that substantially the entire bending action that occurs when the arm 22 is flexed toward the bottom of the runway takes place at the bend or point 25 so that movement of the point 29B of the rib is on a radius connecting the points 25 and 29B, as indicated at R-l, R-2 and R-3. The radius R-l shows the point 293 in its normal position, while the radii R-2 and R-3 show the point 2913 in successive positions to which it is moved as the arm 22 is bent It will be observed that in such progressive rearward movement or tensioning of the arm 22, the point 29B moves progressively farther away from the plane of the web 24;

and conversely, that the spring tension on the arm 22 tending to return the same to its normal position, urges the point 293 toward the plane of the web 24, thus to attain the aforesaid clamping action on the sash.

The fundamental structural relationship which results in this novel and desirable clamping action in the strip 20 is the relative normal locations of the contact point 29B and the primary bending line 25 with respect to the bottom of the sash runway. Thus it will be observed that in the strip 26 the contact point 29B is normally located at a greater distance from the bottom of the runway than the primary bending line 25, and because of this relation, the contact point 29B moves farther away from the parting stop as the arm 22 of the strip is flexed toward the bottom of the runway.

In Figs. 6, 7 and 8 the strip 20 is illustrated as embodied in a complete double hung window installation having right and left hand stiles 35 as hereinbefore described and with strips 20 mounted in association with both of these stiles as hereinbefore-described. It should be noted in this respect that the strips 20 are extended from top to bottom of the sash runways on both of the stiles 35 so that these strips will have a uniform weathersealing and frictional retaining action upon the sashin any vertical position of such sash.

It will be observed in Fig. Sand in Fig. 5 of the drawings that the side edges of the sash are so spaced from each other that the edges of the sash project into the runways only about one-half of the distance to the bottom of such runways, and the sash are held in centered position relative to the runways on opposite sides thereof by the action of the two arms 22 that act on such opposite edges of such particular sash. With this arrangement, the sash may be shifted laterally or parallel to the plane of the sash so as to further compress one of the arms 22 acting thereon, and this may be carried to such an extent as to release the opposite edge from the sash guideway and permit inward withdrawal of this released edge. In the present instance it should be noted, however, that the upper and lower sash have meeting rails 137L and 137U that are arranged to span the space across between the two sash. The installation shown in Fig. 8 of the drawings is arranged so that the releasing movement that is applied to the sash is in a left hand direction, and to enable this movement to take place, the meeting rails 137i. and 137U have their left hand end notches 237L and 237U somewhat deeper than the notches 337 that are formed at the right hand end, this relationship being best shown in Fig. 8 of the drawings.

to apply frictional retaining forces to the opposite edges of the sash by engagement of the edges 31 of the strips with the side edges of the sash, and these forces applied by the strips on opposite edges of the sash oppose each other and act in a plane that is parallel to the plane of the sash. Inaddition, the strips 20 exert a clamping action on the sash between the rib 29 and the web 24, and these forces are applied in a direction that is perpendicular to the plane of the window. Because of the gripping action between the head 29 and the web 24, it has been found that the forces that need to be applied parallel to the plane of the window may be relatively small, and as a result the sash may be removed much more easily than in windows heretofore mounted for releasing movement in'this same general way. The total of the two types of forces applied to the sash is, however, sufficient to retain the sash in any desired position of vertical adjustment.

Another advantageous characteristic of the strip of the I present invention is that swelling-of the window doesnot materially alter the operating characteristics of the installation. Such swelling takes place primarily parallel to the plane of the window so that such swelling tends to force the arms of the weatherstrips toward the bottoms of the runways, thus to increasev the spring tension that is applied to the opposite sides of the sash. Considered apart from the clamping or gripping action that isattained in the present strip, this increase in the lateral forces applied parallel to the plane of the sash would tend to make it"overly difiicult'to pperate the sash when it an;

swelled condition, and this is what happens in the prior devices of which I am aware. Under the present invention, however, this increase in the forces applied by the edges 31 to the swelled window takes place concurrently with a compensating action that results from the par ticular way in which the gripping action is applied to the sash. Thus, it will be noted that when the arm of the Weatherstrip is thus flexed by the swelling of the sash, the pivoting of the arm 22 about the point 25 tends to shift the contact point 29B somewhat further away from the web 24 of the strip, thus to reduce the resilient clamping action that is applied by opposed forces acting perpendicular to the plane of the sash. It has been found that this compensating action results in substantially the same operating characteristics in the window installation regardless of whether or not the sash has swelled from its normal dimensions.

From the foregoing description it will be apparent that the present invention enables window sash to be held frictionally in the desired position of adjustment by forcing that may readily and easily be overcome in a dismounting operation, and it will also be apparent that the strip of the present invention applies the forces to the sash in a novel and improved manner which renders the present strip more advantageous than devices of this kind that have been heretofore used.

Thus, while I have illustrated and described the preferred embodiment of my invention, it is to be understood that this is capable of variation and modification, and I therefore do not wish to be limited to the precise details set forth, but desire to avail myself of such changes and alterations as fall within the purview of the following claims.

The Dunham Patent No. 2,263,872, patented November 11, 1941, is hereby made of record in this application.

I claim:

1. In a sash retaining Weatherstrip, an elongated member of uniform transverse cross sectional form made from a single strip of resilient sheet metal to provide, in cross section, a parting stop housing comprising a mounting web havmg reaction webs extended from opposite ing webs at substantially right angles thereto and terminating in weather sealing edges disposed substantially in the plane of the mounting web, said arms each having a a clamping and weather sealing rib formed longitudinally of the strip between the sealing edge of the arm and the point of connection of such arm with the related diverging web.

2. In a sash retaining Weatherstrip adapted for mounting on a parting stop of predetermined height, an elongated member of uniform transverse cross sectional form made from a single strip of resilient sheet metal to provide, in cross section, a parting stop housing comprising a mounting web having reaction webs of a width equal to about one half of said predetermined height and extended from opposite edges thereof in the same direction and substantially at right angles to said mounting web, diverging webs integrally joined to the respective reaction webs along sharp bend lines and diverging in opposite directions away from the planes of said reaction webs at acute angles with respect to such planes, arms extending from said diverging webs at substantially right angles thereto and terminating in weather sealing edges disposed substantially in the plane of the mounting web, said arms each having a clamping and weather sealing rib formed longitudinally of the strip between the sealing edge of the arm and the point of connection of such arm with the related diverging web.

3. In a sash retaining Weatherstrip adapted for mounting on a parting stop of predetermined height, an elongated member of uniform transverse cross sectional form made from a single strip of resilient sheet metal to provide, in cross section, a parting stop housing comprising a mounting web having reaction webs of a width equal to about one-half of said predetermined height and extended from opposite edges thereof in the same direction and substantially at right angles to said mounting web, diverging webs integrally jointed to the respective reaction webs along sharp bend lines and diverging in opposite directions away from the planes of said reaction webs at acute angles with respect to such planes, arms extend- .ing from said diverging webs at substantially right angles thereto, said arms each having a clamping and weather facing said reaction web.

4. In a Weatherstrip, an elongated member made from resilient sheet metal to afford a reaction web of a width equal to one-half the depth of a sash runway and adapted to be disposed against the side face of one of the stops of a sash runway with one edge disposed adjacent the outer edge of such a stop, an integral mounting web connected to said one edge of said reaction web for securing the same in such a relation to such a stop, the other edge of said reaction web having a connecting web extended integrally therefrom at an angle such that it will diverge at an acute angle from such a side face of such a stop, a further web joined integrally to said connecting web along a sharp bend line and extending therefrom at substantially right angles, and a rib formed along the other edge of said further web to provide a weather sealing and force applying surface facing toward said reaction web.

5. In a Weatherstrip, an elongated member made from resilient sheet metal to provide a reaction web of a width equal to one-half the depth of a sash runway and adapted to be disposed against the side face of one of the stops of a sash runway with one edge disposed adjacent the outer edge of such a stop, means connected to said one edge of said reaction web for securing the same in such a relation to such a stop, the other edge of said reaction web having a connecting web extended integrally therefrom at an angle such that it will diverge at an acute angle from such a side face of such a stop, a further web joined integrally to said connecting web along a sharp bend line and extending therefrom at substantially right angles, and a rib formed along the other edge of said further web to provide a weather sealing and force applying surface facing toward said reaction web.

6. In a Weatherstrip, an elongated member made from resilient sheet metal to provide a reaction web of a width equal to one-half the depth of a sash runway and adapted to be disposed against the side face of one of the stops of a sash runway with one edge disposed adjacent the outer edge of such a stop, means connected to said one edge of said reaction web for securing the same in such a relation to such a stop, the other edge of said reaction web having a connecting web extended integrally therefrom at an angle such that it will diverge at an acute angle from such a side face of such a stop, a further web joined integrally to said connecting web along a sharp bend line and extending therefrom at substantially right angles, a rib formed along the other edge of said further web to provide a weather sealing and force applying surface facing toward said reaction web, and a final weather sealing web extending from the other side of said rib and terminating in a weather sealing edge.

References Cited in the file of this patent UNITED STATES PATENTS 

